Carburetor choke pull off for most 2V and 4V Autolite or Motorcraft carburetors 1958-74. Diaphragm with a hook on it, to 'pull off' the choke. Ford basic part number is 9J549, part of the dashpot assembly.
We do not think that it will fit Holley carburetors.
Also fits AMC and Jeep that used Autolite and Motorcraft carburetors.